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Does Lexium SD326 support 5 volt or 24 volt logical signals?

Lexium SD326 support both 5 volt and 24 volt logical signal inputs.

The inputs to the Lexium SD326 are accessed via a molex socket on the face of SD326 which has 24 pins.
12 of these pins are for 5 volt signals the remaining 12 pins are for 24 volt signals.
It is the optional signal cable that you purchase that determines which pins you interface with.